Please follow the steps in WordPress forum in order to backup the setting of Customizer.

Prerequisites for updating the theme

First you need to download the latest version of theme. Log into your Themeforest account and navigate to your downloads tab. Find the “grandrestaurant” theme purchase.

Click the “download” button next to it and choose to download the “Installable WordPress Theme” which is just the WordPress file, or choose the “Main Files” which is the entire package which include theme documentation, plugins etc.

You need to deactivate “grandrestaurant” theme in the Appearance > Themes by simply activating a different theme. Once you activate a different theme, you can delete the grandrestaurant theme. Don’t worry. You really won’t loose any of your data.

Get the “grandrestaurant-v…installable.zip” file from Themeforest Account > download. If you downloaded the “Main Files” from Themeforest, then you need to unzip the archive file you received, the grandrestaurant-v…installable.zip will be inside of it.

Upload grandrestaurant-v…installable.zip using Appearance > Themes once you uploaded successfully, activate the theme.

Update using FTP

Backup current Theme Setting > Backup. You will get a .JSON file (just in case everything went wrong and you still have theme settings backup file to import).

Login to your FTP account. Navigate to wp-content > themes location and backup your “grandrestaurant” theme folder by saving it to your computer, or you can choose to simply delete it. Don’t worry. You really won’t loose any of your data.

Get the “grandrestaurant-v…installable.zip” file from Themeforest Account > download. If you downloaded the “Main Files” from Themeforest, then you need to unzip the archive file you received, the grandrestaurant-v…installable.zip will be inside of it.

Drag and drop the new “grandrestaurant” folder into wp-content > themes and select “Replace” if you didn’t delete it.

Common Issues

Are You sure you want to do this?
If you get this message. Please check with your webhost upload file size limit and ask them to increase the limitation.

Theme install failed destination folder already exists
This is because WordPress allows you to have only 1 theme with the same name and folder. To get around this issue, please update theme using auto updater or FTP steps above.